(19)
(11)EP 3 288 015 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 15882907.7

(22)Date of filing:  15.09.2015
(51)Int. Cl.: 
G09G 3/20  (2006.01)
(86)International application number:
PCT/CN2015/089605
(87)International publication number:
WO 2016/169194 (27.10.2016 Gazette  2016/43)

(54)

DISPLAY PANEL, DRIVING METHOD AND DISPLAY DEVICE

ANZEIGETAFEL, ANSTEUERUNGSVERFAHREN UND ANZEIGEVORRICHTUNG

PANNEAU D'AFFICHAGE, PROCÉDÉ DE PILOTAGE ET DISPOSITIF D'AFFICHAGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 24.04.2015 CN 201510202920

(43)Date of publication of application:
28.02.2018 Bulletin 2018/09

(73)Proprietors:
  • BOE Technology Group Co., Ltd.
    Beijing 100015 (CN)
  • Beijing BOE Optoelectronics Technology Co., Ltd.
    Beijing 100176 (CN)

(72)Inventors:
  • GUO, Lei
    Beijing 100176 (CN)
  • XU, Shuai
    Beijing 100176 (CN)

(74)Representative: Fritzsche, Thomas 
Fritzsche Patent Naupliastraße 110
81545 München
81545 München (DE)


(56)References cited: : 
CN-A- 101 231 404
CN-A- 104 766 564
US-A1- 2007 002 063
US-A1- 2014 160 172
CN-A- 104 200 784
JP-A- 2001 343 636
US-A1- 2008 180 462
US-B2- 8 274 503
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    FIELD



    [0001] The present disclosure relates to the field of display technology, and particularly to a display panel, a driving method and a display apparatus.

    BACKGROUND



    [0002] In conventional liquid crystal display apparatuses and organic light-emitting diode (OLED) display apparatuses, each point (pixel) displays color via a plurality of subpixels by means of light mixing. For example, each pixel consists of one red subpixel, one green subpixel and one blue subpixel (RGB mode).

    [0003] In order to improve the visual effect, people have put forward higher and higher requirement on the resolution (the number of pixels in unit area) of the display apparatus. This requires the size of subpixel to be smaller and smaller. However, the size of subpixel cannot be reduced without limit due to process limitation.

    [0004] To improve the display effect in the case that the subpixel size is fixed, people propose a virtual display design in a Rainbow arrangement manner. In this design, the arrangement manner of the RGB (Red, Green, Blue) subpixels is the RGB Rainbow arrangement manner. As shown in Fig 1, the display panel comprises pixel groups 1 arranged in a matrix which consist of a plurality of subpixels. The respective pixel groups 1 comprise four row and three columns of subpixels, which are red subpixels R, green subpixels G and blue subpixels B; blue subpixels B, red subpixels R and green subpixels G; green subpixels G, blue subpixels B and red subpixels R; blue subpixels B, red subpixels R and green subpixels G, respectively; gate lines Gate connected to the subpixels of respective rows, data lines Data connected to the subpixels of respective columns, and operational amplifiers 2 connected to the respective data lines Data in one-to-one correspondence. As compared to the traditional display panel, the above display panel virtually designed can reduce the number of subpixels by a third while achieving the same display effect by means of such particular Rainbow subpixel arrangement manner and corresponding virtual algorithm.

    [0005] However, since the above virtual display panel is different from the traditional display panel in that the same data line Data is connected with subpixels of three different colors (R, G, B), the operational amplifiers 2 need to output data signals to the subpixels of respective colors connected to the corresponding data line successively according to the scanning order. In this way, when displaying a picture of solid color (i.e. the grayscale values of R, G, B are all fixed values), the previous row of the green subpixels G may be red subpixels R and may also be blue subpixels B. When the grayscale values of R, G, B are all different, the grayscale values outputted by the same operational amplifier are jumping all the time. For example, when R=0, G=127, B=255 or R=255, G=127, B=0, the grayscale value 127 outputted by the operational amplifier to the green subpixels G may result from jumping from 0 of the previous row, and may also result from jumping from 255 of the previous row. Although at last the grayscale values of the green subpixels G in the entire display panel are all 127, jumping from 0 to 127 actually requires more electrical charges charging the green subpixels G than jumping from 255 to 127, such that the brightness of the green subpixels G with a grayscale value of 127 which jumps from 0 is higher than that of the green subpixels G with a grayscale value of 127 which jumps from 255, thereby visually presenting bright and dark horizontal stripes and influencing the display effect of the display panel.

    [0006] US 2014/0160172 A1 provides a driving integrated circuit capable of driving various image display panels having different pixel arrangements. A data driving unit alternately supplies analog image signals to one of two adjacent data lines. A data switching unit selects the data lines such that the image signals are alternately supplied to the adjacent data lines of the plurality of data lines and electrically connecting the data lines to the output channels of the data driving unit.

    [0007] However, in a display device adopting the above driving integrated circuit, since some data signals are outputted by different buffers to pixels of the same color connected with the same data line, bright and dark horizontal stripes exist and influence the display effect of the display device.

    [0008] JP 2001343636 A provides a matrix type color liquid crystal display device. A plurality of pixels are arranged in a matrix in the row direction and column direction, and each pixel is divided into sub pixels of R, G, B to make color display possible. The G sub pixel having highest luminance among the sub pixels of the three primary colors R, G, B is arranged in the center of each pixel. The peripheral sub pixels are arranged by alternately exchanging the colors R and B by every column. In this way, the disturbance in the picture quality observed as vertical lines by proximity observation can be hardly caused while coloring of the display relating to the sub pixels is suppressed. In particular, a drive signal switching circuit is realized by using four analog switches. Among the analog signals corresponding to the luminances of RGB colors derived from a D/A converter as Rout, Gout, and Bout, the G signal having the highest luminance is supplied to the output buffer as it is, and the R and B signals are alternately switched by analog switches.

    SUMMARY



    [0009] In view of the above, embodiments of the present disclosure provide a display panel, a driving method and a display apparatus for eliminating the bright and dark horizontal stripes presented on the display panel when displaying a picture of solid color, thereby improving the display effect of the display panel.

    [0010] Therefore, a first aspect of the present disclosure provides a display panel which may comprise: several pixel groups arranged in a matrix which consist of N-row × M-column subpixels, gate lines connected to subpixels of respective rows, and a plurality of data lines connected to subpixels of respective columns; wherein N is a positive integer greater than 2, M is a positive integer greater than 1, and in one and the same pixel group, subpixels of the same column comprise subpixels of at least two different colors. The display panel further comprises a plurality of operational amplifiers corresponding to a data line a respective operational amplifier arranged to be connected to corresponding data line via a corresponding switching device respectively, and a control unit connected to respective switching devices. The number of operational amplifiers corresponding to each data line is equal to the number of different color subpixels in the same pixel group connected to each data line, and each operational amplifier is configured to output data signals to subpixels of the same color connected to a corresponding data line successively according to a scanning order of the gate lines.

    [0011] The control unit is configured to control a switching device connected to the data line to be in a conducting state when a gate line connected to a row of pixels is scanned, and wherein the switching device in conducting state is a switching device connected to the operational amplifier configured to output a data signals to a corresponding data line corresponding to the color of the subpixels connected to the data line on the scanned row.

    [0012] The plurality of operational amplifiers are configured such that, in each column of subpixels, data signals are outputted by different operational amplifiers respectively to subpixels of the different colors, and data signals are

    [0013] outputted by a same operational amplifier to the subpixels of the same color.

    [0014] In accordance with another embodiment, in the above display panel provided by embodiments of the present disclosure, in one and the same pixel group, the number of color types of the subpixels in each column of subpixels is the same, and the color types are the same.

    [0015] In accordance with a further embodiment, in the above display panel provided by embodiments of the present disclosure, N=4, M=3, and in one and the same pixel group, subpixels of a first row may be a subpixel of a first color, a subpixel of a second color and a subpixel of a third color, respectively, subpixels of a second row may be a subpixel of the third color, a subpixel of the first color and a subpixel of the second color, respectively, subpixels of a third row may be a subpixel of the second color, a subpixel of the third color and a subpixel of the first color, respectively, and subpixels of a fourth row may be a subpixels of the third color, a subpixel of the first color and a subpixel of the second color, respectively.

    [0016] In accordance with yet another embodiment, in the above display panel provided by embodiments of the present disclosure, the first color, the second color and the third color may be one of red, green and blue, respectively.

    [0017] In accordance with additional embodiments, in the above display panel provided by embodiments of the present disclosure, the switching device may be a transmission gate. A positive phase control terminal and a negative phase control terminal of the transmission gate are both connected to the control unit, an input terminal of the transmission gate is connected to corresponding operational amplifiers, and an output terminal of the transmission gate is connected to corresponding data lines.

    [0018] In accordance with additional embodiments, in the above display panel provided by embodiments of the present disclosure, the switching device may be a switching transistor. A gate of the switching transistor is connected to the control unit, a first end of the switching transistor is connected to corresponding operational amplifiers, a second end of the switching transistor is connected to corresponding data lines, and the first end and the second end are one of a source and a drain, respectively.

    [0019] As known to those skilled in the art, the source of a transistor is not distinguished from the drain thereof. Therefore, the first end of the above transistor can indicate both the source and the drain, and the second end can also indicate both the drain and the source, as long as the first end is different from the second end.

    [0020] In accordance with some embodiments, in the above display panel provided by embodiments of the present disclosure, the switching transistor may be an N-type transistor or P-type transistor.

    [0021] Accordingly, a second aspect of the present disclosure further provides a method for driving any display panel stated above. The method may comprise: scanning gate lines of respective rows successively within one frame of picture;

    [0022] for subpixels of the m-th column of the display panel, when the gate line of the n-th row is scanned, controlling a switching devices connected to the m-th data line to be in a conducting state, wherein the switching device controlled to be in conducting state is connected to the operational amplifier configured to output a data signal corresponding to the color of the subpixel connected to the data line on the n-th row.

    [0023] Accordingly, a third aspect of the present disclosure further provides a display apparatus comprising any display panel provided by embodiments of the present disclosure.

    [0024] In the display panel, driving method and display apparatus provided by embodiments of the present disclosure, since the data signals are outputted by different operational amplifiers to the subpixels of different colors connected to the same data line, and the data signals are outputted by the same operational amplifier to the subpixels of the same color connected with the same data line, when the above display panel displays one frame of picture of solid color, even if the subpixels of different colors correspond to different grayscale values, since the subpixels of the same color connected to the same data line correspond to the same operational amplifier, that is, the data signals of the subpixels of the same color which have the same grayscale value are always outputted by the same operational amplifier, grayscale jump would not take place. Consequently, the charging amounts for the subpixels of the same color are identical and the brightnesses thereof are also the same upon display, thereby eliminating the bright and dark horizontal stripes presented on the display panel when displaying a picture of solid color and improving the display effect of the display panel.

    BRIEF DESCRIPTION OF DRAWINGS



    [0025] 

    Fig 1 is a structural diagram of an existing display panel in Rainbow arrangement manner.

    Fig 2 is a structural diagram of a display panel provided by an embodiment of the present disclosure.

    Fig 3 is a structural diagram of a display panel provided by another embodiment of the present disclosure.

    Figs 4a-4c are a specific structural diagram of a display panel provided by embodiments of the present disclosure, respectively.

    Fig 5 is a specific structural diagram of a display panel provided by embodiments of the present disclosure.

    Fig 6 is a circuit timing diagram of the display panel shown in Fig 5.


    DETAILED DESCRIPTION



    [0026] Specific implementations of the display panel, driving method and display apparatus provided by embodiments of the present disclosure are set forth below in detail with reference to the drawings.

    [0027] A display panel provided by embodiments of the present disclosure comprises, as shown in Fig 2, several pixel groups 1 arranged in a matrix which consist of N-row × M-column subpixels 01, gate lines Gate connected to subpixels 01 of respective rows, and data lines Data connected to subpixels 01 of respective columns; wherein N is a positive integer greater than 2, M is a positive integer greater than 1, and in one and the same pixel group 1, the subpixels 01 of the same column comprise subpixels 01 of at least two colors. Fig 2 makes illustration taking the example that N=3, M=3, and the subpixels 01 of the same column comprise subpixels 01 of three colors which are red subpixels R, green subpixels G and blue subpixels B, respectively.

    [0028] The display panel further comprises a plurality of operational amplifiers (21, 22 and 23 in Fig 2) corresponding to respective data lines Data, respective operational amplifiers being connected to corresponding data lines Data via corresponding switching devices 3, and a control unit 4 connected to respective switching devices 3.

    [0029] The number of the operational amplifiers corresponding to each data line Data is equal to the number of color types of the subpixels 01 connected to the data line Data, and one operational amplifier (21, 22 or 23) corresponds to subpixels 01 of one color (e.g. in Fig 2 21 corresponds to red subpixels R, 22 corresponds to green subpixels G, and 23 corresponds to blue subpixels B). In the plurality of operational amplifiers corresponding to each data line Data, the respective operational amplifiers are used to output data signals to the subpixels 01 of corresponding colors which are connected to the corresponding data line Data successively according to the scanning order of the gate lines Gate.

    [0030] The control unit 4 is used to, for the subpixels 01 of the m-th column of the display panel, control one of the switching devices 3 connected to the data line Data that is connected to the subpixels 01 of the m-th column to be in conducting state when the gate line Gate of the n-th row is scanned, and the switching device 3 in conducting state is a switching device 3 connected to the operational amplifiers for outputting data signals to the subpixels 01 of the n-th row.

    [0031] In the above display panel provided by embodiments of the present disclosure, since the data signals are outputted by different operational amplifiers to the subpixels of different colors connected to the same data line, and the data signals are outputted by the same operational amplifier to the subpixels of the same color connected with the same data line, when the above display panel displays one frame of picture of solid color, even if the subpixels of different colors correspond to different grayscale values, since the subpixels of the same color connected to the same data line correspond to the same operational amplifier, that is, the data signals of the subpixels of the same color which have the same grayscale value are always outputted by the same operational amplifier, grayscale jump would not take place. Consequently, the charging amounts for the subpixels of the same color are identical and the brightnesses thereof are also the same upon display, thereby eliminating the bright and dark horizontal stripes presented on the display panel when displaying a picture of solid color and improving the display effect of the display panel.

    [0032] Further, in the above display panel provided by embodiments of the present disclosure, as shown in Fig 3, when M is larger than 1, for M data lines Data corresponding to each column of pixel groups 1, the data lines Data connected with the subpixels 01 of the same color correspond to the same operational amplifier which outputs data signals to the subpixels 01 of the same color. As shown in Fig 3, assume that one column of pixel groups 1 has three columns of subpixels, then it corresponds to three data lines Data, and subpixels 01 of the first column, subpixels 01 of the second column and subpixels 01 of the third column all comprise red subpixels R, green subpixels G and blue subpixels B. Therefore, the three data lines Data are all connected to the same operational amplifier (21 in Fig 3) corresponding to the red subpixels R, the same operational amplifier (22 in Fig 3) corresponding to the green subpixels G, and the same operational amplifier (23 in Fig 3) corresponding to the blue subpixels B. Namely, the three data lines corresponding to one column of pixel groups are connected to three operational amplifiers (21, 22 and 23 in Fig 3), respectively. In this way, the number of amplifiers can be reduced by sharing the amplifiers, thereby reducing the cost.

    [0033] Further, in the above display panel provided by embodiments of the present disclosure, in one and the same pixel group, the numbers of color types of the subpixels in respective columns of subpixels are the same, and the color types are the same. For example, each column of subpixels comprises subpixels of three colors, and the types of the three colors in each column of subpixels are the same. In this way, in one and the same pixel group, each data line is connected to the same number of operational amplifiers, and each operational amplifier is connected to each data line corresponding to one and the same pixel group.

    [0034] Specifically, upon specific implementation, the above display panel provided by embodiments is particular suitable for a display panel in Rainbow arrangement manner. As shown in Figs 4a to 4c, in one pixel group, N=4, M=3, and in one and the same pixel group, the subpixels 01 of the first row are a subpixel 011 of a first color, a subpixel 012 of a second color and a subpixel 013 of a third color, respectively; the subpixels 01 of the second row are a subpixel 013 of the third color, a subpixel 011 of the first color and a subpixel 012 of the second color, respectively; the subpixels of the third row are a subpixel 012 of the second color, a subpixel 013 of the third color and a subpixel 011 of the first color, respectively; the subpixels of the fourth row are a subpixel 013 of the third color, a subpixel 011 of the first color and a subpixel 012 of the second color, respectively.

    [0035] Upon specific implementation, in the above display panel provided by embodiments of the present disclosure, the first color, the second color and the third color are one of red, green and blue, respectively. Assuming that the first color is red, the second color can only be green or blue, and the third color can only be blue or green.

    [0036] Specifically, in Figs 4a to 4c, one pixel group is taken as an example, wherein the data lines connected to respective columns of subpixels in one-to-one correspondence are Data 1, Data 2 and Data 3, respectively, the gate lines connected to respective rows of subpixels in one-to-one correspondence are Gate 1, Gate 2, Gate 3 and Gate 4, respectively, the operational amplifier for providing a data signal to the subpixel 011 of the first color is 211, the operational amplifier for providing a data signal to the subpixel 012 of the second color is 212, and the operational amplifier for providing a data signal to the subpixel 013 of the third color is 213.

    [0037] In accordance with some embodiments of the present disclosure, in the above display panel provided by embodiments of the present disclosure, the switching device may be a transmission gate, a switching transistor or other electronic switching devices, which are not defined here.

    [0038] Since there would be signal loss during the transmission of signals from the source to the drain when the switching transistor is in conducting state, in order to avoid such signal loss, the switching device may be a transmission gate in the above display panel provided by embodiments of the present disclosure.

    [0039] Specifically, upon specific implementation, in the above display panel provided by embodiments of the present disclosure, as shown in Fig 4a, the switching device 3 is a transmission gate (in Fig 4a the three transmission gates connected to the data line Data 1 are TG11, TG12 and TG13, respectively, the three transmission gates connected to the data line Data 2 are TG21, TG22 and TG23, respectively, and the three transmission gates connected to the data line Data 3 are TG31, TG32 and TG33, respectively).

    [0040] The positive phase control terminal and the negative phase control terminal of the transmission gate are both connected to the control unit 4, the input terminal thereof is connected to a corresponding operational amplifier 2, and the output terminal thereof is connected to a corresponding data line Data. When the signal of the positive phase control terminal is a high level signal, and the signal of the negative phase control terminal is a low level signal, the transmission gate is in conducting state; when the signal of the positive phase control terminal is a low level signal, and the signal of the negative phase control terminal is a high level signal, the transmission gate TG is in cut-off state.

    [0041] Specifically, upon specific implementation, in the above display panel provided by embodiments of the present disclosure, as shown in Figs 4b and 4c, the switching device 3 is a switching transistor (in Figs 4b and 4c the three switching transistors connected to the data line Data 1 are T11, T12 and T13, respectively, the three switching transistors connected to the data line Data 2 are T21, T22 and T23, respectively, and the three switching transistors connected to the data line Data 3 are T31, T32 and T33, respectively).

    [0042] The gate of the switching transistor is connected to the control unit 4, the source thereof is connected to a corresponding operational amplifier 2, and the drain thereof is connected to a corresponding data line Data.

    [0043] It is to be noted that the source of the switching transistor is not distinguished from the drain thereof. Therefore, in the above arrangement, it is also possible that the drain of the switching transistor is connected to a corresponding operational amplifier 2, and the source thereof is connected to a corresponding data line Data.

    [0044] Further, in the above display panel provided by embodiments of the present disclosure, the switching transistor may be an N-type transistor or may also be a P-type transistor. As shown in Fig 4b, when the switching transistor is an N-type transistor and the signal of the gate is a high level signal, the switching transistor is in conducting state; when the signal of the gate is a low level signal, the switching transistor is in cut-off state. Or, as shown in Fig 4c, when the switching transistor is a P-type transistor and the signal of the gate is a low level signal, the switching transistor is in conducting state; when the signal of the gate is a high level signal, the switching transistor is in cut-off state.

    [0045] Further, in the display panel provided by embodiments of the present disclosure, when the switching transistors are all N-type transistors or all P-type transistors, when the gate line of the n-th row is scanned, one of the plurality of switching transistors connected to each data line is in conducting state. Therefore, the control unit can send the same control signal to the gates of these switching transistors in conducting state to control these switching transistors to be in conducting state simultaneously or in cut-off state simultaneously.

    [0046] Specifically, taking the display panels shown in Figs 4b and 4c as examples, when the gate line Gate 1 of the first row is scanned, the switching transistors T11, T22 and T33 are in conducting state simultaneously, the switching transistors T13, T21 and T32 are in cut-off state simultaneously, and the switching transistors T12, T23 and T31 are in cut-off state simultaneously. When the gate line Gate 2 of the second row is scanned, the switching transistors T13, T21 and T32 are in conducting state simultaneously, the switching transistors T11, T22 and T33 are in cut-off state simultaneously, and the switching transistors T12, T23 and T31 are in cut-off state simultaneously. When the gate line Gate 3 of the third row is scanned, the switching transistors T12, T23 and T31 are in conducting state simultaneously, the switching transistors T13, T21 and T32 are in cut-off state simultaneously, and the switching transistors T11, T22 and T33 are in cut-off state simultaneously. When the gate line Gate 4 of the fourth row is scanned, the switching transistors T11, T22 and T33 are in conducting state simultaneously, the switching transistors T13, T21 and T32 are in cut-off state simultaneously, and the switching transistors T12, T23 and T31 are in cut-off state simultaneously. Accordingly, the switching transistors T11, T22 and T33 are always in conducting state or cut-off state simultaneously, the switching transistors T12, T23 and T31 are always in conducting state or cut-off state simultaneously, and the switching transistors T13, T21 and T32 are always in conducting state or cut-off state simultaneously. Therefore, as shown in Fig 5, the control unit (not shown in Fig 5) can send the same control signal C1 to the switching transistors T11, T22 and T33, send the same control signal C2 to the switching transistors T12, T23 and T31, and send the same control signal C3 to the switching transistors T13, T21 and T32.

    [0047] Taking the display panel shown in Fig 5 as an example, the working process thereof is described below in detail, and the working timing diagram is as shown in Fig 6. In the following description 1 represents a high level signal, while 0 represents a low level signal.

    [0048] When the gate line Gate 1 of the first row is scanned, C1=1, C2=0, C3=0. The switching transistors T11, T22 and T33 are in conducting state, and the remaining switching transistors are in cut-off state. The operational amplifier 211 provides a data signal to the subpixel 011 of the first color in the first row via the switching transistor T11, the operational amplifier 212 provides a data signal to the subpixel 012 of the second color in the first row via the switching transistor T22, and the operational amplifier 213 provides a data signal to the subpixel 013 of the third color in the first row via the switching transistor T33.

    [0049] When the gate line Gate 2 of the second row is scanned, C1=0, C2=1, C3=0. The switching transistors T12, T23 and T31 are in conducting state, and the remaining switching transistors are in cut-off state. The operational amplifier 211 provides a data signal to the subpixel 011 of the first color in the second row via the switching transistor T12, the operational amplifier 212 provides a data signal to the subpixel 012 of the second color in the second row via the switching transistor T23, and the operational amplifier 213 provides a data signal to the subpixel 013 of the third color in the second row via the switching transistor T31.

    [0050] When the gate line Gate 3 of the third row is scanned, C1=0, C2=0, C3=1. The switching transistors T13, T21 and T32 are in conducting state, and the remaining switching transistors are in cut-off state. The operational amplifier 211 provides a data signal to the subpixel 011 of the first color in the third row via the switching transistor T13, the operational amplifier 212 provides a data signal to the subpixel 012 of the second color in the third row via the switching transistor T21, and the operational amplifier 213 provides a data signal to the subpixel 013 of the third color in the third row via the switching transistor T32.

    [0051] When the gate line Gate 4 of the fourth row is scanned, C1=0, C2=1, C3=0. The switching transistors T12, T23 and T31 are in conducting state, and the remaining switching transistors are in cut-off state. The operational amplifier 211 provides a data signal to the subpixel 011 of the first color in the fourth row via the switching transistor T12, the operational amplifier 212 provides a data signal to the subpixel 012 of the second color in the fourth row via the switching transistor T23, and the operational amplifier 213 provides a data signal to the subpixel 013 of the third color in the fourth row via the switching transistor T31.

    [0052] Thereafter, the above four processes are cycled by the first control signal C1, the second control signal C2 and the third control signal C3 until all the gate lines are scanned.

    [0053] On the basis of the same concept, embodiments of the present disclosure further provide a method for driving any display panel stated above, comprising:

    scanning the gate lines of respective rows successively within one frame of picture;

    for the subpixels of the m-th column of the display panel, when the gate line of the n-th row is scanned, the control unit controlling one of the switching devices connected to the data line connected to the subpixels of the m-th column to be in conducting state, the operational amplifiers corresponding to the subpixels of the n-th row outputting data signals to the subpixels of the n-th row via the switching device in conducting state.



    [0054] On the basis of the same concept, embodiments of the present disclosure further provide a display apparatus comprising any of the above display panels provided by embodiments of the present disclosure. The display apparatus may be any product or component having display function such as mobile phone, tablet computer, television, display, notebook computer, digital frame, navigator, and so on. Implementation of the display apparatus may refer to the embodiments of the above display panel. Repeated parts are not described here for simplicity.

    [0055] In the display panel, driving method and display apparatus provided by embodiments of the present disclosure, since the data signals are outputted by different operational amplifiers to the subpixels of different colors connected to the same data line, and the data signals are outputted by the same operational amplifier to the subpixels of the same color connected with the same data line, when the above display panel displays one frame of picture of solid color, even if the subpixels of different colors correspond to different grayscale values, since the subpixels of the same color connected to the same data line correspond to the same operational amplifier, that is, the data signals of the subpixels of the same color which have the same grayscale value are always outputted by the same operational amplifier, grayscale jump would not take place. Consequently, the charging amounts for the subpixels of the same color are identical and the brightnesses thereof are also the same upon display, thereby eliminating the bright and dark horizontal stripes presented on the display panel when displaying a picture of solid color and improving the display effect of the display panel.

    [0056] Obviously, those skilled in the art can make various modifications and variations to the present disclosure without departing from the scope of the appended claims.


    Claims

    1. A display panel, comprising: several pixel groups (1) arranged in a matrix which consist of N-row × M-column subpixels (01), gate lines (Gate) connected to subpixels (01) of respective rows, and a plurality of data lines (Data) connected to subpixels (01) of respective columns; wherein N is a positive integer greater than 2, M is a positive integer greater than 1, and in one and the same pixel group (1), subpixels (01) of each column comprise subpixels of at least two different colors,
    a plurality of operational amplifiers (21, 22, 23) corresponding to a data line (Data), a respective operational amplifier (21, 22, 23) arranged to be connected to a corresponding data line (Data) via a corresponding switching device (3), respectively, and a control unit (4) connected to respective switching devices (3),
    wherein,
    the number of operational amplifiers (21, 22, 23) corresponding to each data line (Data) is equal to the number (N) of different color subpixels (01) in the same pixel group connected to each data line (Data), and each operational amplifier (21,22, 23) is configured to output data signals to subpixels (01) of the same color connected to a corresponding data line (Data) successively according to a scanning order of the gate lines (Gate);
    the control unit (4) is configured to control a switching device (3) connected to the data line (Data) to be in a conducting state when a gate line (Gate) connected to a row of pixels is scanned, wherein the switching device (3) controlled to be in the conducting state is a switching device (3) connected to the operational amplifier (21, 22, 23) configured to output a data signal to the data line corresponding to the color of the subpixel (01) connected to said data line on the scanned row; and
    the plurality of operational amplifiers (21, 22, 23) are configured such that, in each column of subpixels, data signals are outputted by different operational amplifiers (21, 22, 23) respectively to subpixels of the different colors, and data signals are outputted by a same operational amplifier (21, 22, 23) to the subpixels of the same color.
     
    2. The display panel according to claim 1, wherein in one and the same pixel group (1), the number of color types of the subpixels (01) in each column of subpixels is the same, and the color types are the same.
     
    3. The display panel according to claim 2, wherein N=4, M=3, and in one and the same pixel group (1), subpixels (01) of a first row are a subpixel of a first color, a subpixel of a second color and a subpixel of a third color, respectively, subpixels (01) of a second row are a subpixel of the third color, a subpixel of the first color and a subpixel of the second color, respectively, subpixels (01) of a third row are a subpixel of the second color, a subpixel of the third color and a subpixel of the first color, respectively, subpixels of a fourth row are a subpixel of the third color, a subpixel of the first color and a subpixel of the second color, respectively.
     
    4. The display panel according to claim 3, wherein the first color, the second color and the third color are one of red, green and blue, respectively.
     
    5. The display panel according to any one of claims 1 to 4, wherein the switching device (3) is a transmission gate, and
    a positive phase control terminal and a negative phase control terminal of the transmission gate are both connected to the control unit, an input terminal of the transmission gate is connected to corresponding operational amplifiers, and an output terminal of the transmission gate is connected to corresponding data lines.
     
    6. The display panel according to any one of claims 1 to 4, wherein the switching device (3) is a switching transistor, and
    a gate of the switching transistor is connected to the control unit, a first end of the switching transistor is connected to corresponding operational amplifiers, a second end of the switching transistor is connected to corresponding data lines, the first end and the second end are one of a source and a drain, respectively.
     
    7. The display panel according to claim 6, wherein the switching transistor is an N-type transistor or P-type transistor.
     
    8. A method for driving the display panel according to any one of claims 1 to 7, comprising:

    scanning gate lines of respective rows successively within one frame of picture;

    for subpixels of the m-th column of the display panel, when the gate line of the n-th row is scanned, controlling a switching devices (3) connected to the m-th data line (Data) to be in a conducting state when the gate line (Gate) of the n-th row is scanned, wherein the switching device (3) controlled to be in the conducting state is connected to the operational amplifier (21, 22, 23) configured to output a data signal to said data line corresponding to the color of the subpixel (01) connected to the said data line on the n-throw.


     
    9. A display apparatus, comprising the display panel according to any one of claims 1 to 7.
     


    Ansprüche

    1. Anzeigetafel, umfassend: mehrere Pixelgruppen (1), die in einer Matrix angeordnet sind, die aus Teilpixeln von N-Reihe X M-Spalte (01) bestehen, Gate-Leitungen (Gate), die mit Teilpixeln (01) jeweiliger Reihen verbunden sind, und eine Vielzahl von Datenleitungen (Data), die mit Teilpixeln (01) jeweiliger Spalten verbunden sind; wobei N eine positive ganze Zahl größer 2 ist, M eine positive ganze Zahl größer 1 ist und in ein und derselben Pixelgruppe (1) Teilpixel (01) jeder Spalte Teilpixel von zumindest zwei unterschiedlichen Farben umfassen, eine Vielzahl von Betriebsverstärkern (21, 22, 23) entsprechend einer Datenleitung (Data), wobei ein jeweiliger Betriebsverstärker (21, 22, 23) angeordnet ist, um jeweils über eine entsprechende Schaltvorrichtung (3) mit einer entsprechenden Datenleitung (Data) verbunden zu werden, und eine Steuereinheit (4), die mit jeweiligen Schaltvorrichtungen (3) verbunden ist, wobei die Anzahl an Betriebsverstärkern (21, 22, 23) entsprechend jeder Datenleitung (Data) gleich der Anzahl (N) an unterschiedlichen Farbteilpixeln (01) in der gleichen Pixelgruppe ist, die mit jeder Datenleitung (Data) verbunden ist, und jeder Betriebsverstärker (21, 22, 23) konfiguriert ist, um Datensignale an Teilpixel (01) der gleichen Farbe auszugeben, die sukzessive gemäß einer Scanreihenfolge der Gate-Leitungen (Gates) mit einer entsprechenden Datenleitung (Data) verbunden sind;

    wobei die Steuereinheit (4) konfiguriert ist, um eine Schaltvorrichtung (3) zu steuern, die mit der Datenleitung (Data) verbunden ist, sodass sie sich in einem leitenden Zustand befindet, wenn eine Gate-Leitung (Gate), die mit einer Reihe an Pixeln verbunden ist, gescannt wird, wobei die Schaltvorrichtung (3), die gesteuert wird, sodass sie sich in einem leitenden Zustand befindet, eine Schaltvorrichtung (3) ist, die mit dem Betriebsverstärker (21, 22, 23) verbunden ist, der konfiguriert ist, um ein Datensignal an die Datenleitung entsprechend der Farbe des Teilpixels (01), das mit der Datenleitung an der gescannten Reihe verbunden ist, auszugeben;

    und die Vielzahl von Betriebsverstärkern (21, 22, 23) konfiguriert ist, sodass in jeder Spalte an Teilpixeln Datensignale durch unterschiedliche Betriebsverstärker (21, 22, 23) jeweils an Teilpixel der unterschiedlichen Farben ausgegeben werden und Datensignale durch einen gleichen Betriebsverstärker (21, 22, 23) an die Teilpixel der gleichen Farbe ausgegeben werden.


     
    2. Anzeigetafel nach Anspruch 1, wobei in ein und derselben Pixelgruppe (1) die Anzahl an Farbtypen der Teilpixel (01) in jeder Spalte an Teilpixeln die gleiche ist und die Farbtypen die gleichen sind.
     
    3. Anzeigetafel nach Anspruch 2, wobei N=4, M=3 und in ein und derselben Pixelgruppe (1) Teilpixel (01) einer ersten Reihe jeweils ein Teilpixel einer ersten Farbe, ein Teilpixel einer zweiten Farbe und ein Teilpixel einer dritten Farbe sind, Teilpixel (01) einer zweiten Reihe jeweils ein Teilpixel einer dritten Farbe, ein Teilpixel der ersten Farbe und ein Teilpixel der zweiten Farbe sind, Teilpixel (01) einer dritten Reihe jeweils ein Teilpixel der zweiten Farbe, ein Teilpixel der dritten Farbe und ein Teilpixel der ersten Farbe sind, Teilpixel einer vierten Reihe jeweils ein Teilpixel der dritten Farbe, ein Teilpixel der ersten Farbe und ein Teilpixel der zweiten Farbe sind.
     
    4. Anzeigetafel nach Anspruch 3, wobei die erste Farbe, die zweite Farbe und die dritte Farbe jeweils eines von rot, grün und blau sind.
     
    5. Anzeigetafel nach einem der Ansprüche 1 bis 4, wobei die Schaltvorrichtung (3) ein Übertragungsgate ist und ein Positivphasensteueranschluss und ein Negativphasensteueranschluss des Übertragungsgates beide mit der Steuereinheit verbunden sind, ein Eingangsanschluss des Übertragungsgates mit entsprechenden Betriebsverstärkern verbunden ist und ein Ausgangsanschluss des Übertragungsgates mit entsprechenden Datenleitungen verbunden ist.
     
    6. Anzeigetafel nach einem der Ansprüche 1 bis 4, wobei die Schaltvorrichtung (3) ein Schalttransistor ist und ein Gate des Schalttransistors mit der Steuereinheit verbunden ist, ein erstes Ende des Schalttransistors mit entsprechenden Betriebsverstärkern verbunden ist, ein zweites Ende des Schalttransistors mit entsprechenden Datenleitungen verbunden ist, das erste Ende und das zweite Ende jeweils eines von einer Quelle und einem Drain sind.
     
    7. Anzeigetafel nach Anspruch 6, wobei der Schalttransistor ein N-Typ-Transistor oder ein P-Typ-Transistor ist.
     
    8. Verfahren zum Ansteuern der Anzeigetafel nach einem der Ansprüche 1 bis 7, umfassend:

    Scannen von Gate-Leitungen von jeweiligen Reihen sukzessive innerhalb eines Bildframes;

    für Teilpixel der m-ten Spalte der Anzeigetafel, wenn die Gate-Leitung der n-ten Reihe gescannt wird, Steuern einer Schaltvorrichtung (3), die mit der m-ten Datenleitung (Data) verbunden ist, sodass sie sich in einem leitenden Zustand befindet, wenn die Gate-Leitung (Gate) der n-ten Reihe gescannt wird, wobei die Schaltvorrichtung (3), die gesteuert wird,

    sodass sie sich in einem leitenden Zustand befindet, mit dem Betriebsverstärker (21, 22, 23) verbunden ist, der konfiguriert ist, um ein Datensignal an die Datenleitung entsprechend der Farbe des Teilpixels (01), das mit der Datenleitung an der n-ten Reihe verbunden ist, auszugeben.


     
    9. Anzeigevorrichtung, umfassend die Anzeigetafel nach einem der Ansprüche 1 bis 7.
     


    Revendications

    1. Panneau d'affichage, comprenant : plusieurs groupes de pixels (1) agencés en une matrice qui sont constitués de N rangées x M colonnes de sous-pixels (01), de lignes de grille (Gate) connectées à des sous-pixels (01) de rangées respectives, et d'une pluralité de lignes de données (Data) connectées à des sous-pixels (01) de colonnes respectives ; dans lequel N est un nombre entier positif supérieur à 2, M est un nombre entier positif supérieur à 1, et dans un et même groupe de pixels (1), des sous-pixels (01) de chaque colonne comprennent des sous-pixels d'au moins deux couleurs différentes, une pluralité d'amplificateurs opérationnels (21, 22, 23) correspondant à une ligne de données (Data), un amplificateur opérationnel (21, 22, 23) respectif étant agencé pour être connecté à une ligne de données (Data) correspondante via un dispositif de commutation (3) correspondant, respectivement, et une unité de commande (4) connectée à des dispositifs de commutation (3) respectifs, dans lequel, le nombre d'amplificateurs opérationnels (21, 22, 23) correspondant à chaque ligne de données (Data) est égal au nombre (N) de sous-pixels (01) de couleurs différentes dans le même groupe de pixels connecté à chaque ligne de données (Data), et chaque amplificateur opérationnel (21, 22, 23) est configuré pour fournir en sortie des signaux de données à des sous-pixels (01) de la même couleur connectés à une ligne de données (Data) correspondante successivement selon un ordre de balayage des lignes de grille (Gate) ;

    l'unité de commande (4) est configurée pour commander un dispositif de commutation (3) connecté à la ligne de données (Data) pour qu'il soit dans un état conducteur lorsqu'une ligne de grille (Gate) connectée à une rangée de pixels est balayée, dans lequel le dispositif de commutation (3) commandé pour être dans l'état conducteur est un dispositif de commutation (3) connecté à l'amplificateur opérationnel (21, 22, 23) configuré pour fournir en sortie un signal de données à la ligne de données correspondant à la couleur du sous-pixel (01) connecté à ladite ligne de données sur la rangée balayée ; et

    la pluralité d'amplificateurs opérationnels (21, 22, 23) sont configurés de sorte que, dans chaque colonne de sous-pixels, des signaux de données soient fournis en sortie par des amplificateurs opérationnels (21, 22, 23) différents respectivement à des sous-pixels des couleurs différentes, et que des signaux de données soient fournis en sortie par un même amplificateur opérationnel (21, 22, 23) aux sous-pixels de la même couleur.


     
    2. Panneau d'affichage selon la revendication 1, dans lequel dans un et même groupe de pixels (1), le nombre de types de couleur des sous-pixels (01) dans chaque colonne de sous-pixels est le même, et les types de couleur sont les mêmes.
     
    3. Panneau d'affichage selon la revendication 2, dans lequel N = 4, M = 3, et dans un et même groupe de pixels (1), des sous-pixels (01) d'une première rangée sont un sous-pixel d'une première couleur, un sous-pixel d'une deuxième couleur et un sous-pixel d'une troisième couleur, respectivement, des sous-pixels (01) d'une deuxième rangée sont un sous-pixel de la troisième couleur, un sous-pixel de la première couleur et un sous-pixel de la deuxième couleur, respectivement, des sous-pixels (01) d'une troisième rangée sont un sous-pixel de la deuxième couleur, un sous-pixel de la troisième couleur et un sous-pixel de la première couleur, respectivement, des sous-pixels d'une quatrième rangée sont un sous-pixel de la troisième couleur, un sous-pixel de la première couleur et un sous-pixel de la deuxième couleur, respectivement.
     
    4. Panneau d'affichage selon la revendication 3, dans lequel la première couleur, la deuxième couleur et la troisième couleur sont l'une du rouge, du vert et du bleu, respectivement.
     
    5. Panneau d'affichage selon l'une quelconque des revendications 1 à 4, dans lequel le dispositif de commutation (3) est une grille de transmission, et une borne de commande de phase positive et une borne de commande de phase négative de la grille de transmission sont toutes deux connectées à l'unité de commande, une borne d'entrée de la grille de transmission est connectée à des amplificateurs opérationnels correspondants, et une borne de sortie de la grille de transmission est connectée à des lignes de données correspondantes.
     
    6. Panneau d'affichage selon l'une quelconque des revendications 1 à 4, dans lequel le dispositif de commutation (3) est un transistor de commutation, et une grille du transistor de commutation est connectée à l'unité de commande, une première extrémité du transistor de commutation est connectée à des amplificateurs opérationnels correspondants, une seconde extrémité du transistor de commutation est connectée à des lignes de données correspondantes, la première extrémité et la seconde extrémité sont l'un d'une source et d'un drain, respectivement.
     
    7. Panneau d'affichage selon la revendication 6, dans lequel le transistor de commutation est un transistor de type N ou un transistor de type P.
     
    8. Procédé de pilotage du panneau d'affichage selon l'une quelconque des revendications 1 à 7, comprenant :

    le balayage successif de lignes de grille de rangées respectives au sein d'une trame d'image ;

    pour des sous-pixels de la mième colonne du panneau d'affichage, lorsque la ligne de grille de la nième rangée est balayée, la commande d'un dispositif de commutation (3) connecté à la mième ligne de données (Data) pour qu'il soit dans un état conducteur lorsque la ligne de grille (Gate) de la nième rangée est balayée, dans lequel le dispositif de commutation (3) commandé pour être dans l'état conducteur est connecté à l'amplificateur opérationnel (21, 22, 23) configuré pour fournir en sortie un signal de données à ladite ligne de données correspondant à la couleur du sous-pixel (01) connecté à ladite ligne de données sur la nième rangée.


     
    9. Appareil d'affichage, comprenant le panneau d'affichage selon l'une quelconque des revendications 1 à 7.
     




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    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description